Electrolyte and compound for the electrolyte and capacitor

Abstract

An electrolyte is provided, which includes organic solvent; and (1) a compound and an ammonium salt thereof, (2) a diacid and an ammonium salt thereof, or (3) a combination thereof. The compound has a chemical structure ofwherein R1 is C1-8 alkyl group, C1-8 alkenyl group, C1-8 alkynyl group, or aromatic group; and R2 is —(CnH2n)—OH, and n is an integer from 2 to 8. The diacid has a chemical structure ofwherein R3 is C1-8 alkyl group, C1-8 alkenyl group, C1-8 alkynyl group, or aromatic group.

What is claimed is: 
     
       1. A compound used in an electrolyte, having a chemical structure of: 
       
         
           
           
               
               
           
         
       
       wherein R 1  is C 1-8  alkyl group, C 1-8  alkenyl group, C 1-8  alkynyl group, or aromatic group, R 2  is —(C n H 2n )—OH, and n is an integer from 2 to 8. 
     
     
       2. The compound used in the electrolyte as claimed in  claim 1 , wherein R 1  is a methyl group or a tert-butyl group, and n is 2. 
     
     
       3. An electrolyte, comprising:
 an organic solvent; and 
 (1) a compound and an ammonium salt thereof; or a combination of (1) the compound and the ammonium salt thereof and (2) a diacid and an ammonium salt thereof, wherein the compound has a chemical structure of 
 
       
         
           
           
               
               
           
         
       
       wherein R 1  is C 1-8  alkyl group, C 1-8  alkenyl group, C 1-8  alkynyl group, or aromatic group; and R 2  is —(C n H 2n )—OH, and n is an integer from 2 to 8; wherein the diacid has a chemical structure of: 
       
         
           
           
               
               
           
         
       
       wherein R 3  is C 1-8  alkyl group, C 1-8  alkenyl group, C 1-8  alkynyl group, or aromatic group. 
     
     
       4. The electrolyte as claimed in  claim 3 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.01:1 to 1.5.1. 
     
     
       5. The electrolyte as claimed in  claim 3 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.02:1 to 0.45:1. 
     
     
       6. The electrolyte as claimed in  claim 3 , further comprising polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymerized fatty acid, silicon dioxide, polyglyceride, dichromium ammonium acid, citric acid, or a combination thereof. 
     
     
       7. The electrolyte as claimed in  claim 6 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, and the weight of polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymeric fatty acid, silicon dioxide, polyglyceride, ammonium dichromate, citric acid, or a combination thereof have a ratio of 1:0.01 to 1.0.5. 
     
     
       8. The electrolyte as claimed in  claim 3 , wherein the organic solvent includes ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, glycerol, N,N-dimethylformamide, gamma-butyrolactone, propylene carbonate, ethylene carbonate, diethyl carbonate, diethylene glycol methyl ether, diethylene glycol monobutyl ether, gamma-valerolactone, or a combination thereof. 
     
     
       9. The electrolyte of  claim 8 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof and the weight of the organic solvent have a ratio of 16 to 1:10. 
     
     
       10. A capacitor, comprising:
 a capacitor element, comprising:
 an anode aluminum foil; 
 a cathode aluminum foil; and 
 a separator, interposed therebetween the anode aluminum foil and the cathode aluminum foil; and 
 
 an electrolyte, wherein the capacitor element is impregnated with the electrolyte, 
 wherein the electrolyte comprises: an organic solvent; and (1) a compound and an ammonium salt thereof or combination of (1) die compound and the ammonium salt thereof and (2) a diacid and an ammonium salt thereof, wherein the compound has a chemical structure of: 
 
       
         
           
           
               
               
           
         
       
       wherein R 1  is C 1-8  alkyl group, C 1-8  alkenyl group, C 1-8  alkynyl group, or aromatic group; and R 2  is —(C n H 2n )—OH, and n is an integer from 2 to 8; wherein the diacid has a chemical structure of: 
       
         
           
           
               
               
           
         
       
       wherein R 3  is C 1-8  alkyl group, C 1-8  alkenyl group, C 1-8  alkynyl group, or aromatic group. 
     
     
       11. The capacitor as claimed in  claim 10 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.01:1 to 1.5.1. 
     
     
       12. The capacitor as claimed in  claim 10 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.02:1 to 0.45:1. 
     
     
       13. The capacitor as claimed in  claim 10 , further comprising polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymerized fatty acid, silicon dioxide, polyglyceride, dichromium ammonium acid, citric acid, or a combination thereof. 
     
     
       14. The capacitor as claimed in  claim 13 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, and the weight of polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymeric fatty acid, silicon dioxide, polyglyceride, ammonium dichromate, citric acid, or a combination thereof have a ratio of 1:0.01 to 1.0.5. 
     
     
       15. The capacitor as claimed in  claim 10 , wherein the organic solvent includes ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, glycerol, N,N-dimethylformamide, gamma-butyrolactone, propylene carbonate, ethylene carbonate, diethyl carbonate, Diethylene glycol methyl ether, diethylene glycol monobutyl ether, gamma-valerolactone, or a combination thereof. 
     
     
       16. The capacitor as claimed in  claim 15 , wherein the weight of (1) the compound and the ammonium salt thereof, or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof and the weight of the organic solvent have a ratio of 1:6 to 1:10.